EP3225125B1 - Sicherheitsschuh und verfahren zur herstellung - Google Patents
Sicherheitsschuh und verfahren zur herstellung Download PDFInfo
- Publication number
- EP3225125B1 EP3225125B1 EP17168207.3A EP17168207A EP3225125B1 EP 3225125 B1 EP3225125 B1 EP 3225125B1 EP 17168207 A EP17168207 A EP 17168207A EP 3225125 B1 EP3225125 B1 EP 3225125B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shell
- chassis
- components
- recessed area
- footwear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims description 26
- 210000001872 metatarsal bone Anatomy 0.000 claims description 23
- 210000002683 foot Anatomy 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000006378 damage Effects 0.000 claims description 7
- 208000027418 Wounds and injury Diseases 0.000 claims description 6
- 208000014674 injury Diseases 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 4
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 2
- 238000005187 foaming Methods 0.000 claims 2
- BFMKFCLXZSUVPI-UHFFFAOYSA-N ethyl but-3-enoate Chemical compound CCOC(=O)CC=C BFMKFCLXZSUVPI-UHFFFAOYSA-N 0.000 claims 1
- 210000003371 toe Anatomy 0.000 description 47
- 238000005553 drilling Methods 0.000 description 8
- 231100001010 corrosive Toxicity 0.000 description 7
- 230000000717 retained effect Effects 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 210000004744 fore-foot Anatomy 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 239000003518 caustics Substances 0.000 description 2
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- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000004132 cross linking Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/32—Footwear with health or hygienic arrangements with shock-absorbing means
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
- A43B1/08—Footwear characterised by the material made of metal
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B1/00—Footwear characterised by the material
- A43B1/14—Footwear characterised by the material made of plastics
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
- A43B13/386—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process multilayered
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/38—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process
- A43B13/41—Built-in insoles joined to uppers during the manufacturing process, e.g. structural insoles; Insoles glued to shoes during the manufacturing process combined with heel stiffener, toe stiffener, or shank stiffener
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
- A43B17/003—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined characterised by the material
- A43B17/006—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined characterised by the material multilayered
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/08—Heel stiffeners; Toe stiffeners
- A43B23/081—Toe stiffeners
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/08—Heel stiffeners; Toe stiffeners
- A43B23/081—Toe stiffeners
- A43B23/082—Toe stiffeners made of metal
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/08—Heel stiffeners; Toe stiffeners
- A43B23/081—Toe stiffeners
- A43B23/086—Toe stiffeners made of impregnated fabrics, plastics or the like
- A43B23/087—Toe stiffeners made of impregnated fabrics, plastics or the like made of plastics
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
- A43B23/08—Heel stiffeners; Toe stiffeners
- A43B23/088—Heel stiffeners
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/24—Collapsible or convertible
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/24—Collapsible or convertible
- A43B3/242—Collapsible or convertible characterised by the upper
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/26—Footwear with health or hygienic arrangements with foot-supporting parts with toe-spacers or toe-spreaders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/0009—Producing footwear by injection moulding; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
- B29D35/14—Multilayered parts
- B29D35/146—Uppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/08—Copolymers of ethylene
- B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0089—Impact strength or toughness
Definitions
- the present invention relates, in general, to safety footwear for use in harsh conditions, such as in a variety of agricultural, food processing, energy exploration, industrial, and/or hazmat environments.
- Previously proposed arrangements are disclosed in EP 2 446 765 A1 .
- Footwear developed to withstand harsh conditions, such as conditions in which the wearer is subject to constant exposure to water, chemicals, hot or cold temperatures, or natural corrosives, must be constructed to withstand those conditions while maintaining comfort for the wearer.
- harsh conditions such as conditions in which the wearer is subject to constant exposure to water, chemicals, hot or cold temperatures, or natural corrosives, must be constructed to withstand those conditions while maintaining comfort for the wearer.
- a common area in which certain footwear is subject to one or more of the foregoing environments is, for example, in the oil drilling industry.
- drilling platforms may be in an environment in which the ground or working area is constantly muddy, laced with chemicals or corrosive additives used during drilling, or both.
- Fracking or hydraulic fracturing is a practice in the drilling industry in which the aforementioned conditions are commonly present.
- footwear In such harsh working conditions, footwear often degrades or deteriorates entirely within a short period of time, subjecting the user to unnecessary costs in purchasing footwear at short intervals. For example, certain footwear available in the current market may only last for a period of two (2) or three (3) weeks in such conditions.
- solid elastomer and/or rubber footwear currently used in the above-noted environments tend to be heavy; and, since footwear weight and flexibility are factors that impact human ambulation efficiencies and/or the amount of energy expended during normal work shifts, these considerations may be significant.
- heavy and/or non-flexible footwear may increase worker fatigue as compared to if lighter and/or more flexible footwear was used.
- expandable polymeric materials e.g., polyolefin elastomers (PE), ethylene-vinyl acetate (EVA), or other such materials
- PE polyolefin elastomers
- EVA ethylene-vinyl acetate
- expandable polymeric materials may be placed into an injection mold and formed into various footwear-type components.
- aspects of the present invention provide footwear that can withstand harsh environments while providing ample safety for the user in those environments.
- FIGs. 1A-C such depicts footwear 10 being composed of a number of components, namely an outer shell 20 and an assembled chassis 50 inserted and secured into the shell 20.
- Figs. 1A-B depict, in detail, outer shell 20 and chassis 50, the latter of which may itself include a number of components, particularly: (1) a safety toe box or cap 52; (2) a puncture resistant insole board 66; (3)a shock diffusion plate 76; and (4) a heel counter 86.
- Other components may also form part of chassis 50, as set forth in additional embodiments discussed below. Nonetheless, in each embodiment, chassis 50 may be inserted into shell 20 and secured thereto so that a user may not remove chassis 50. In this manner, footwear 10 may provide safety for a user in certain dangerous or harsh environments ( e.g., in the drilling industry).
- chassis 50 may include a toe cap 52 having inner and outer surfaces 54, 56, the toe cap 52 being arrangeable over a user's forefoot region to protect the user's toes from injury due to an impact or other event.
- toe cap 52 may be formed of rigid material, such as a hard polymer, metal, or other material, and include a section 58 overlying a user's toes.
- Toe cap 52 may also include a lower protruding section 62, in this embodiment, that is connected at its inner surface 54 to insole board 66, as discussed below.
- toe cap 52 may include stop surfaces 60, 64 for engaging with certain stop surfaces in outer shell 20.
- chassis 50 may include, as alluded to above, an insole board 66 that in some cases is puncture resistant.
- Insole board 66 may have inner and outer surfaces 68, 70 and ends 72, 74, which are connected at their outer surface 70 to toe cap 52 and heel counter 86, respectively.
- Heel counter 86 may likewise include inner and outer surfaces 88, 90, and a lower protruding section 92 for engaging with insole board 66. Heel counter 86 may also provide rigidity to chassis 50 at that section so that, when a user inserts his/her foot into footwear 10, stability is provided in the heel region. As with toe cap 52, heel counter 86 also has stop surfaces 94, 96 for engaging with corresponding stop surfaces in shell 20.
- Chassis 50 further includes a shock diffusion plate 76 in this embodiment ( Fig. 1B ) that overlies insole board 66.
- Shock diffusion plate 76 may, if desired, take the form of tuck board-type material (e.g., standard footwear cellulose, or entangled non-woven or woven-type materials, with or without stiffening agents) that is rigid in nature so as to absorb any shock or force impacted on insole board 66.
- shock diffusion plate 76 may be any of the shock diffusion plates shown and described in USPN 6,205,683 to Clark et al. , owned by The Timberland Company. Together, the aforementioned components create one embodiment of chassis 50 that is insertable into shell 20 in the manner discussed below.
- Shell 20 may include several aspects common to typical footwear, such as an outsole 22, an upper 24, and heel 26, forefoot 28, and instep 30 sections.
- shell 20 is also impermeable to certain substances, such as water, mud, or other solutions or corrosives.
- Shell 20 may also include an inner cavity 21 shaped to accommodate a user's foot, which has various recessed areas or cutouts 31, 32 for receiving a portion of chassis 50.
- recessed areas 31, 32 may be bounded by stop surfaces 34 on either side to receive and securely hold a portion of chassis 50 within the relevant recessed area 31, 32.
- shell 20 may include two (2) recessed areas 31, 32 for accommodating toe cap 52 and heel counter 86 therein, although more or less recessed areas may be employed.
- chassis 50 may be inserted into shell 20, such that toe cap 52 is situated in recessed area 31 of shell 20, and heel counter 86 is likewise situated in separate recessed area 32.
- stop surface 64 of toe cap 52 and stop surfaces 94, 96 of heel counter 86 may contact respective stop surfaces 34 surrounding recessed areas 31, 32 of shell 20 so that toe cap 52, heel counter 86, and thus chassis 50 are securely retained within shell 20.
- stop surface 60 may also contact an alternate stop surface 34 within shell 20 (e.g., recessed area 31 may be made to be smaller so that a stop surface 34 of recessed area 31 contacts stop surface 60 to retain toe cap 52 within shell 20).
- chassis 50 may snap into place within shell 20 so that chassis 50 is non-removable therefrom.
- a user may press-fit toe cap 52 and heel counter 86 within recessed areas 31, 32, such that chassis 50 is retained within shell 20 due to interference between stop surfaces 34, 64, 94, 96 (and in an alternate embodiment, stop surface 60).
- chassis 50 may be manufactured so that a dimensional interference is created between chassis 50 and shell 20 (e.g., certain portions of chassis 50, such as toe cap 52 and heel counter 86, may be arranged so that such portions can be press-fit into recessed areas 31, 32).
- stop surface 64 on toe cap 52 and stop surface 94 on heel counter 86 may be separated by a first distance, which is slightly less than a second distance separating stop surfaces 34 of recessed areas 31, 32 that contact stop surfaces 64, 94.
- stop surfaces 64, 94 may be forced past stop surfaces 34 of recessed areas 31, 32 to securely lock chassis 50 in place ( e.g., via a dimensional interference).
- toe cap 52 may adequately ensure that a user's toes are not injured due to an impact event (e.g., an object striking the toes), insole board 66 may provide puncture resistance, shock diffusion plate 76 may diminish or absorb any impact forces borne on the foot, and heel counter 86 may provide support for a user's heel during use.
- shell 20 may provide corrosion resistance and/or impermeability with respect to several substances (e.g., water, mud, corrosive liquids/chemicals, etc.)
- shell 20 may be manufactured from particular corrosion-resistant materials, such as crosslinking post-injection expansion polyolefin elastomers.
- shell 20 may be manufactured through an injection-molding process that uses expandable polymers, such as EVA.
- a mold may be injected with EVA or EVA-type material to form shell 20, and once appropriately cured, shell 20 may be released from the mold into the configuration shown in Fig. 1A (or any of the remaining figures depicting alternate embodiments of shell 20).
- the curing process may be controlled by subjecting shell 20 to engineered expansion (e.g., controlling ambient conditions, temperature, time, etc.)
- shell 20 may be relatively smaller than in its final configuration ( Fig. 1A ), and once released, shell 20 may expand to its final state. Then, after shell 20 has been released from the mold and allowed to expand to its final form ( Fig. 1A , or the other figures depicting the shell), chassis 50 may be inserted into and secured within shell 20 in the manner discussed previously.
- footwear 10 meeting the various requirements mandated in certain industries (e.g., the non-removability of safety components), such as in the drilling industry.
- footwear 10 utilizing the aforementioned features not only provides comfort for the user, along with safety, but also lasts far longer in corrosive environments than other existing arrangements. As such, within these industries, the consumer is not forced to purchase footwear 10 at exceedingly short intervals of time.
- FIG. 2A-C An alternate version of footwear 10 is shown in Figs. 2A-C , in which chassis 50 and shell 20 are slightly modified.
- chassis 50 and shell 20 are slightly modified.
- like numerals refer to like elements, except where indicated.
- chassis 150 is generally the same as chassis 50, except that chassis 150 includes a metatarsal guard 198.
- Metatarsal guard 198 may have respective inner and outer surfaces 200, 202 and an end 206 that connects with toe cap 152.
- end 206 includes an L-shaped groove that connects with toe cap 152 so that both components are an integral unit forming part of chassis 150.
- metatarsal guard 198 may take the form of any of the metatarsal guards shown or otherwise described in U.S. Patent Application No. 13/648,839 (the '839 Application), entitled "Protection Devices for Use in Shoes or Other Products".
- metatarsal guard 198 may be positioned over the metatarsal region of a user's foot to protect the same from injury.
- metatarsal guard 198 may be positioned within instep 130 of shell 120 to overlie the metatarsal region of the user's foot.
- Fig. 2A depicts shell 120 as having a recessed area 131 that extends from a portion of a floor 136 of shell 120 adjacent forefoot end 128 to a section of shell 120 adjacent instep 130.
- recessed area 131 may be designed specifically to accommodate metatarsal guard 198 and toe cap 152, in combination.
- Recessed area 132 may be of the same configuration and shape as recessed area 32 of the previous embodiment of shell 20 so that heel counter 186 may be received within such recessed area 132.
- Metatarsal guard 198 may also include a stop surface 204 ( Fig. 2B ) that engages with stop surface 134 bordering recessed area 131 upon insertion of chassis 150 within shell 120.
- chassis 150 may be inserted within inner cavity 121 of shell 120 so that heel counter 186 is received within recessed area 132, and metatarsal guard 198 and toe cap 152 are received within recessed area 131.
- stop surfaces 194, 196 of heel counter 186 may engage with stop surfaces 134 of recessed area 132 to secure heel counter 186 within recessed area 132
- stop surface 164 of toe cap 152 and stop surface 204 of metatarsal guard 198 may engage with stop surfaces 134 of recessed area 131 to secure toe cap 152 and metatarsal guard 198 within recessed area 131.
- chassis 150 may also be cemented or adhered within recessed areas 131, 132 so that chassis 150 may be non-removable from shell 120.
- chassis 150 may simply snap into place within recessed areas 131, 132, such that chassis 150 is not removable from shell 120, as detailed more fully above.
- a distance between stop surface 164 of toe cap 152 and stop surface 204 of metatarsal guard 198 may be greater than a distance between stop surfaces 134 of recessed area 131, such that toe cap 152 and metatarsal guard 198 may be press-fit into recessed area 131.
- heel counter 186 and recessed area 132 in one embodiment.
- FIG. 3A-C an alternate embodiment of footwear 10, 110, namely footwear 310, is shown.
- like numerals refer to like elements in this embodiment.
- chassis 350 is generally the same as chassis 50 ( Figs. 1A-C ), except that chassis 350 may include an insole 410 that is specifically configured to be puncture resistant (e.g., via being composed of rigid material(s), such as metal, hard plastics or composites, etc.)
- insole board 366 may have puncture-resistant characteristics as well, insole 410 may provide yet additional puncture resistance to chassis 350.
- insole 410 may have inner and outer surfaces 412, 414 and respective toe and heel ends 416, 418, the outer surface 414 of such ends 416, 418 being bonded, respectively, to lower protruding section 362 of toe cap 352 and lower protruding section 392 of heel counter 386. As such, insole 410 may overly the inner surfaces 354, 388 of lower protruding sections 362, 392 of toe cap 352 and heel counter 386, respectively.
- shell 320 in this embodiment may be generally identical to the previous shells 20, 120 so as to accommodate chassis 350.
- the assembly of footwear 310 as shown in Fig. 3C , may proceed substantially as discussed above with respect to footwear 10 of Figs. 1A-C (with the addition of added puncture resistance via insole 410).
- chassis 350 may be non-removable from shell 320, as in previous embodiments, so that footwear 310 satisfies certain safety requirements of various recognized regulatory bodies.
- FIG. 4A A further variant of footwear 10, 110, 310 may be provided, the shell 520 of which is shown in Figs. 4A-C .
- the footwear shell 520 may include an opening 538. Opening 538 may be shaped to accommodate an outsole 522 ( Fig. 4B ) that is applied to shell 520 after manufacture thereof. Thus, opening 538 may be specifically configured to accommodate outsole 522.
- outsole 522 may include a set of flanges 540, 542 and stop surfaces 544, 546 adjacent such flanges 540, 542; and, to fully construct shell 520, outsole 522 may be inserted through opening 538, such that flanges 540, 542 engage corresponding flanges 547, 548 of shell 520 ( Fig. 4A ) and stop surfaces 544, 546 engage respective stop surfaces 543, 545 formed adjacent flanges 547, 548 of shell 520.
- the engagement between shell 520 and outsole 522 is shown in detail in Fig. 4C .
- outsole 522 may be securely retained within shell 520 post-manufacture of shell 520. Indeed, in one embodiment, outsole 522 is cemented to shell 520, or adhered via an adhesive, chemical bonding, etc.
- outsole 522 may serve to create the same configuration as the previously-described shells 20, 120, 320. Indeed, referring to Fig. 4C , a portion of outsole 522 adjacent flange 540 may create a stop surface 534 forming part of recessed area 531, and a portion of stop surface 546 of outsole 522 may act as a stop surface 534 for recessed area 532, as shown. As such, once outsole 522 is attached to shell 520, any of the aforementioned chassis 50, 150, 350 may be inserted into and secured within shell 520 in the manner described previously. In other embodiments, it is also contemplated that the size of opening 538 and the configuration of outsole 522 may be modified, if desired.
- FIG. 5A-B Yet an additional variant of footwear is shown in Figs. 5A-B .
- like reference numerals refer to like elements unless otherwise indicated.
- Shell 620 may be made of any of the materials and according to any of the processes as set forth above for shells 20, 120, 320, 520.
- Shell 620 includes an internal cavity 621, an upper 624, an outsole 622, and heel 626, forefoot 628, and instep 630 sections, as with shells 20, 120, 320, 520.
- Shell 620 differs from shells 20, 120, 320, 520, however, in that it has a different arrangement for engaging with its corresponding chassis 650, shown in Fig. 5B .
- shell 620 includes a set of recesses 606, 607 for engaging with certain sections of chassis 650 (described in more detail below) to retain chassis 650 within shell 620.
- Recesses 606, 607 in a preferred embodiment, extend substantially entirely or entirely around the perimeter of shell 620, as shown in Figs. 5A-B , although it is contemplated that recesses 606, 607 may alternatively be formed along only certain sections of the perimeter of shell 620 and not along other sections. In one embodiment, recess 606 may be stepped to engage with a correspondingly-shaped section of chassis 650.
- Chassis 650 is shown in Fig. 5B (and represented in outline in Fig. 5A ).
- Chassis 650 includes a chassis body 601 and, in some cases, an optional puncture device 605 overlying a section of chassis body 601. Puncture device 605 may protect a user's foot from damage due to a sharp object puncturing through chassis body 601, and thus, puncture device 605 is constructed of a rigid material adapted to block the object from puncturing through device 605 and injuring the user's foot.
- Chassis 650 also includes an optional safety toe 652 (not shown). Although safety toe 652 is not actually shown in the figures, it is represented by a cavity in the area of chassis 650 where safety toe 652 would be located.
- safety toe 652 may be press-fit, adhered, or otherwise secured within that cavity of chassis 650, if desired, so that chassis 650 includes a safety toe 652 for protection.
- Safety toe 652 as with the previous toe caps 52, 152, 352, may be formed of rigid material, such as a hard polymer, metal, or other material, and include a section overlying a user's toes to protect the toes from injury ( e.g., due to a heavy object falling on the user's toe area).
- chassis body 601 also includes specific geometries for engaging with shell 620.
- chassis body 601 includes a set of flanges 602 for engaging with recesses 606, 607 in shell 620, and a set of projections 603 for receiving optional puncture device 605 and/or contacting a section of recess 606 ( e.g., in the case of the right-side projection 603 in Fig. 5B ).
- Flanges 602 may be formed entirely or substantially entirely around the perimeter of chassis 650, as shown in Figs. 5A-B , so that, once engaged, chassis 650 is not removable from shell 620 ( e.g., during ordinary use by the user). In alternate embodiments, flanges 602 are formed only along certain sections of the perimeter of chassis 650, but not along other sections.
- Chassis body 601 also includes a stop surface/end 604 for engaging with a separate stop surface 634 of shell 620.
- shell 620 may first be produced according to the methods discussed above and allowed to expand to its final state (e.g., by using expandable EVA materials inserted into a mold). Then, chassis 650 may be inserted into cavity 621 of shell 620, such that its flanges 602 are arranged within recesses 606, 607, as shown in outline in Fig. 5A . This acts to at least partially retain chassis 650 within shell 620, such that chassis 650 cannot be removed by a user. In other words, since flanges 602 are engaged with recesses 606, 607 about substantially or the entire perimeter of chassis 650 and shell 620, as shown in outline in Fig. 5A , chassis 650 is securely retained within shell 620.
- stop/end surface 604 of chassis 650 may also come to rest on stop surface 634 of shell 620 to assist in securing chassis 650 relative to shell 620.
- a step is also formed in chassis body 601 and shell 620 adjacent instep region 630 for even further enhanced engagement between chassis 650 and shell 620 at that area.
- stop surfaces 34, 134, 334, 534, 634 of respective shells 20, 120, 320, 520, 620 may be angled in certain embodiments to better retain chassis 50, 150, 350, 650; and that, if necessary, the respective stop surfaces of chassis 50, 150, 350, 650 that engage stop surfaces 34, 134, 334, 534, 634 of shells 20, 120, 320, 520, 620 may be angled as well.
- stop surfaces 34, 134, 334, 534, 634 of respective shells 20, 120, 320, 520, 620 may be arranged so that an acute angle is formed at the junction of the inner surface of shells 20, 120, 320, 520, 620 and the relevant stop surface 24, 134, 334, 534, 634.
- the respective component of chassis 50, 150, 350, 650 may be more securely retained within shell 20, 120, 320, 520, 620 via the interaction between the stop surface(s) of those components, and the angled stop surfaces 34, 134, 334, 534, 634 of shells 20, 120, 320, 520, 620.
- stop surfaces 34, 134, 334, 534, 634 of shells 20, 120, 320, 520, 620 may be arranged at an acute angle while others are arranged as shown in the figures and described above. Thus, varying combinations are possible.
- stop surface(s) on certain components of chassis 50, 150, 350, 650 may be angled as well to mate with the acute angle of stop surfaces 34, 134, 334, 534, 634.
- guard 198 may be situated on chassis 350 in much the same manner as chassis 150.
- certain components from one of chassis 50, 150, 350, 650 may be substituted or added to another of chassis 50, 150, 350, 650, although not depicted in the figures.
- chassis 50, 150, 350, 650 may be arranged differently than shown in the figures.
- puncture-resistant insole 410 is shown as being attached to inner surfaces 354, 388 of toe cap 352 and heel counter 386, respectively, insole 410 may be arranged to overlay toe cap 352 and heel counter 386 ( e.g., be attached to outer surfaces 356, 390 thereof).
- shell 320 in particular recessed areas 331, 332) may also be reconfigured so that chassis 350 is securely retained within shell 320.
- the various chassis 50, 150, 350, 650 may be rearranged and accommodated, securely, within one of shells 20, 120, 320, 520, 620.
- any of chassis 50, 150, 350, 650 may be composed of expandable materials (like shells 20, 120, 320, 520, 620) so that, once inserted into shell 20, 120, 320, 520, 620, the chassis 50, 150, 350, 650 may expand and be more securely retained within recessed areas 31, 32, 131, 132, 331, 332, 531, 532.
- the expandable materials that could be utilized to compose chassis 50, 150, 350, 650 are set forth above.
- shells 20, 120, 320, 520, 620 while described above as being formed via the use of expandable materials, may alternatively be formed with non-expandable materials (e.g., traditional rubber materials, other composites, etc.)
- non-expandable materials e.g., traditional rubber materials, other composites, etc.
- the concepts of the present invention(s) have applicability with non-expandable shells 20, 120, 320, 520, 620 in that such shells 20, 120, 320, 520, 620 may receive any of chassis 50, 150, 350, 650 securely therein to adequately comply with the aforementioned safety standards.
- the chassis 50, 150, 350, 650, once inserted within the particular shell 20, 120, 320, 520, 620 would likely be non-removable from such shell 20, 120, 320, 520, 620 to meet those standards.
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- Wood Science & Technology (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Claims (12)
- Satz von Komponenten eines Schuhwerksystems (10, 110, 310), der in einem nicht zusammengesetzten Zustand umfasst:eine Schale (20, 120, 320, 520, 620) mit einem inneren Hohlraum (21, 121, 321, 521, 621) und mindestens einem ausgesparten Bereich (31, 32, 131, 132, 331, 332, 531, 532, 606, 607), der von einer Innenfläche der Schale versetzt ist; undeinen Unterbau (50, 150, 350, 650) mit einer oder mehreren Komponenten (52, 66, 76, 86), der ausgelegt ist, einen Fuß eines Benutzers vor Verletzung zu schützen, wobei der Unterbau ausgestaltet ist, in den inneren Hohlraum der Schale eingesetzt zu werden, und nach Einsetzen in die Schale innerhalb des mindestens einen ausgesparten Bereichs der Schale dauerhaft fixiert zu sein, wobei die Schale unabhängig von dem Unterbau ausgebildet ist.
- Satz von Komponenten nach Anspruch 1, wobei der mindestens eine ausgesparte Bereich der Schale durch eine Anschlagfläche (34, 134, 334, 534, 634) begrenzt ist, die in einem Winkel zu der Innenfläche der Schale angeordnet ist, und die eine oder mehreren Komponenten eine entsprechende Anschlagfläche aufweisen, die ausgelegt ist, in die Anschlagfläche der Schale einzugreifen, um die eine oder mehreren Komponenten innerhalb des ausgesparten Bereichs zu halten.
- Satz von Komponenten nach einem der Ansprüche 1-2, wobei jeder ausgesparte Bereich einen Satz von Anschlagflächen aufweist, die in einem Winkel zu der Innenfläche der Schale angeordnet sind, und jede Komponente entsprechende Anschlagflächen (60, 64, 94, 96, 204, 604) aufweist, die ausgelegt sind, in die Anschlagflächen der Schale einzugreifen, um die Komponente innerhalb des ausgesparten Bereichs zu halten.
- Satz von Komponenten nach einem der Ansprüche 1-3, wobei die Schale aus einem korrosionsbeständigen Material oder einem Material besteht, das aus der Gruppe ausgewählt ist bestehend aus einem Polyolefin-Elastomer, einem Ethylvinylacetat, einem expandierbaren Polymer oder einem kopolymerisierten Material, das für ein vernetztes Schäumen in einem Schäumungsprozess von expandierbarem Material nach einem Einspritzen geeignet ist.
- Satz von Komponenten nach einem der Ansprüche 1-4, wobei der Unterbau eine Zehenkappe (52), die aus einem starren Material besteht, eine Fersenverstärkung (86), und eine Brandsohleneinlage (66), die mit der Zehenkappe und der Fersenverstärkung in Eingriff ist, aufweist und wobei die eine oder mehreren Komponenten die Zehenkappe und die Fersenverstärkung umfassen.
- Satz von Komponenten nach Anspruch 5, wobei der Unterbau einen Mittelfußschutz (198) aufweist, der ausgelegt ist, über einem Mittelfußbereich eines Benutzers positioniert zu sein, um den Mittelfußbereich des Benutzers vor Verletzung zu schützen.
- Satz von Komponenten nach Anspruch 6, wobei der Unterbau eine durchstichsichere Brandsohle (66) aufweist, die mit der Zehenkappe und der Fersenverstärkung in Eingriff ist.
- Satz von Komponenten nach einem der Ansprüche 1-7, wobei die eine oder mehreren Komponenten des Unterbaus an den mindestens einen ausgesparten Bereich zu kleben sind.
- Satz von Komponenten nach einem der Ansprüche 1-8, wobei die eine oder mehreren Komponenten in dem mindestens einen ausgesparten Bereich derart angeordnet sind, dass ein Übermaß dazwischen die eine oder mehreren Komponenten sicher innerhalb des ausgesparten Bereichs hält.
- Satz von Komponenten nach einem der Ansprüche 1-9, wobei die Schale undurchlässig für Wasser oder andere Lösungen ist.
- Satz von Komponenten nach einem der Ansprüche 1-10, wobei der Unterbau von einer ersten Abmessung zu einer zweiten, größeren Abmessung expandierbar ist, um den Unterbau dauerhaft innerhalb der Schale zu arretieren.
- Verfahren zum Herstellen eines Schuhwerksystems, wobei das Verfahren umfasst:unabhängiges Formen:(i) einer Schale mit einem inneren Hohlraum und mindestens einem ausgesparten Bereich, der von einer Innenfläche der Schale versetzt ist; und(ii) eines Unterbaus mit einer oder mehreren Komponenten, der ausgelegt ist, einen Fuß eines Benutzers vor Verletzung zu schützen; undEinsetzen des Unterbaus in den inneren Hohlraum der Schale, wodurch die eine oder mehreren Komponenten des Unterbaus nach Einsetzen in die Schale dauerhaft innerhalb des mindestens einen ausgesparten Bereichs der Schale fixiert werden.
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EP14774295.1A EP2967190B1 (de) | 2013-03-13 | 2014-03-13 | Sicherheitsschuh |
PCT/US2014/025916 WO2014160148A1 (en) | 2013-03-13 | 2014-03-13 | Safety footwear |
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2014
- 2014-03-13 EP EP17168207.3A patent/EP3225125B1/de active Active
- 2014-03-13 CA CA2904668A patent/CA2904668C/en active Active
- 2014-03-13 CN CN201480027302.6A patent/CN105188444B/zh active Active
- 2014-03-13 CN CN201711195157.4A patent/CN107736679A/zh active Pending
- 2014-03-13 MX MX2015012647A patent/MX2015012647A/es unknown
- 2014-03-13 WO PCT/US2014/025916 patent/WO2014160148A1/en active Application Filing
- 2014-03-13 EP EP14774295.1A patent/EP2967190B1/de active Active
- 2014-03-13 US US14/208,037 patent/US9635902B2/en active Active
-
2016
- 2016-07-18 HK HK16108472.2A patent/HK1220331A1/zh unknown
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2017
- 2017-03-20 US US15/463,589 patent/US20170188658A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
HK1220331A1 (zh) | 2017-05-05 |
CN105188444A (zh) | 2015-12-23 |
US20170188658A1 (en) | 2017-07-06 |
EP3225125A1 (de) | 2017-10-04 |
MX2015012647A (es) | 2017-04-06 |
US9635902B2 (en) | 2017-05-02 |
CN107736679A (zh) | 2018-02-27 |
US20140259768A1 (en) | 2014-09-18 |
EP2967190A1 (de) | 2016-01-20 |
CA2904668A1 (en) | 2014-10-02 |
CA2904668C (en) | 2019-07-09 |
EP2967190A4 (de) | 2016-11-16 |
CN105188444B (zh) | 2017-12-12 |
WO2014160148A1 (en) | 2014-10-02 |
EP2967190B1 (de) | 2020-05-06 |
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